mod_proxy/6040: New feature: mod_proxy should pass on original IP

[Markus Peter <wa...@spin.de>]

>Number:         6040
>Category:       mod_proxy
>Synopsis:       New feature: mod_proxy should pass on original IP
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          change-request
>Submitter-Id:   apache
>Arrival-Date:   Mon May 01 08:30:00 PDT 2000
>Closed-Date:
>Last-Modified:
>Originator:     warp-apache@spin.de
>Release:        1.3.12
>Organization:
apache
>Environment:
RedHat Linux 5.2, Kernel 2.2.12
>Description:
I'd like an option in mod_proxy so that when I use it with ProxyPass it sends the current REMOTE_ADDR to the mirrored server in a freely choosable HTTP Header, so that the server which is really handling the request knows where the request really came from.

Let me explain our situation: We're having a setup with two different Apache's, one mod_perl'ed, the other one not. We like to send certain requests from the normal server to the mod_perl'ed server on another machine. Unfortunately we lose the original IP in the process. A setup in which we simply run the mod_perl server on the same machine is unfortunately impossible.
>How-To-Repeat:
no problem - enhancement request
>Fix:
A new configuration directive: e.g.:
ProxyPass /foo http//www.foo.com/bar/
ProxyPassIP Original_IP
will add the current REMOTE_ADDR as header
Original_IP: ${REMOTE_ADDR} 
to all proxy requests eg. to the request to www.foo.com/bar/
>Release-Note:
>Audit-Trail:
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